of course, in technology, that never happens. happened to the stock market value angered investors. it was worth over $500 billion. apple's was worth just 15 billion and google hadn't even made its stock market debut. today, apple is way ahead, worth over 450 billion and google's value has outstripped that of microsoft. its shares per up on the news of ballmer's and. last autumn, the embattled chief executive told me he was not complacent. >> everybody will always say that there is a chance to do better in any company. we will continue to work hard as a company to improve. >> for all of his enthusiasm, windows eight and the new surface tablet have not really excited consumers. now, microsoft is looking for a new boss who can point the company towards a more innovative future. >> the search is on at microsoft. starting tomorrow, a series of events will be held to mark the 50th anniversary of the march on washington. martin luther king delivered his famous i have a dream speech. from coast-to-coast, there are many murals bearing king's image. one photographer has spent the last 30 yea